/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/scalar_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:20:57,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:20:57,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:20:57,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:20:57,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:20:57,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:20:57,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:20:57,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:20:57,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:20:57,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:20:57,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:20:57,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:20:57,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:20:57,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:20:57,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:20:57,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:20:57,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:20:57,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:20:57,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:20:57,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:20:57,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:20:57,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:20:57,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:20:57,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:20:57,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:20:57,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:20:57,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:20:57,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:20:57,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:20:57,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:20:57,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:20:57,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:20:57,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:20:57,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:20:57,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:20:57,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:20:57,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:20:57,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:20:57,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:20:57,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:20:57,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:20:57,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:20:57,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:20:57,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:20:57,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:20:57,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:20:57,225 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:20:57,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:20:57,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:20:57,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:20:57,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:20:57,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:20:57,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:20:57,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:20:57,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:20:57,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:20:57,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:20:57,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:20:57,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:20:57,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:20:57,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:20:57,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:20:57,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:20:57,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:20:57,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:20:57,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:20:57,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:20:57,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:20:57,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:20:57,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:20:57,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:20:57,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:20:57,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:20:57,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:20:57,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:20:57,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:20:57,585 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:20:57,586 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/scalar_loopdep.i [2020-10-12 10:20:57,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af0a830c8/c309e4b142954a019ee96fb03c8225ae/FLAG30c3ddf0a [2020-10-12 10:20:58,122 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:20:58,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/scalar_loopdep.i [2020-10-12 10:20:58,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af0a830c8/c309e4b142954a019ee96fb03c8225ae/FLAG30c3ddf0a [2020-10-12 10:20:58,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af0a830c8/c309e4b142954a019ee96fb03c8225ae [2020-10-12 10:20:58,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:20:58,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:20:58,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:20:58,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:20:58,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:20:58,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:20:58" (1/1) ... [2020-10-12 10:20:58,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c286c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:58, skipping insertion in model container [2020-10-12 10:20:58,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:20:58" (1/1) ... [2020-10-12 10:20:58,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:20:58,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:20:58,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:21:00,278 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:21:00,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:21:00,326 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:21:00,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00 WrapperNode [2020-10-12 10:21:00,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:21:00,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:21:00,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:21:00,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:21:00,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... [2020-10-12 10:21:00,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... [2020-10-12 10:21:00,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... [2020-10-12 10:21:00,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... [2020-10-12 10:21:00,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... [2020-10-12 10:21:00,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... [2020-10-12 10:21:00,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... [2020-10-12 10:21:00,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:21:00,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:21:00,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:21:00,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:21:00,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:21:00,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:21:00,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:21:00,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:21:00,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:21:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:21:00,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:21:00,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:21:00,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:21:00,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:21:00,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:21:00,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:21:00,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:21:00,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:21:00,725 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:21:00,726 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:21:00,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:21:00 BoogieIcfgContainer [2020-10-12 10:21:00,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:21:00,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:21:00,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:21:00,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:21:00,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:20:58" (1/3) ... [2020-10-12 10:21:00,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179f6eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:21:00, skipping insertion in model container [2020-10-12 10:21:00,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:21:00" (2/3) ... [2020-10-12 10:21:00,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179f6eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:21:00, skipping insertion in model container [2020-10-12 10:21:00,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:21:00" (3/3) ... [2020-10-12 10:21:00,740 INFO L109 eAbstractionObserver]: Analyzing ICFG scalar_loopdep.i [2020-10-12 10:21:00,751 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:21:00,766 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:21:00,782 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:21:00,810 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:21:00,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:21:00,810 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:21:00,810 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:21:00,810 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:21:00,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:21:00,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:21:00,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:21:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-12 10:21:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 10:21:00,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:00,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:00,878 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1821336840, now seen corresponding path program 1 times [2020-10-12 10:21:00,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:00,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722408044] [2020-10-12 10:21:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:01,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:01,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:01,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 10:21:01,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:01,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-12 10:21:01,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:01,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:21:01,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:01,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:21:01,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:01,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:01,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:01,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:01,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 10:21:01,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:01,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:01,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:01,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:01,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:01,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722408044] [2020-10-12 10:21:01,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:21:01,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 10:21:01,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228649546] [2020-10-12 10:21:01,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 10:21:01,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 10:21:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:21:01,269 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-12 10:21:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:01,370 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-10-12 10:21:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 10:21:01,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-12 10:21:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:01,383 INFO L225 Difference]: With dead ends: 49 [2020-10-12 10:21:01,383 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 10:21:01,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:21:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 10:21:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-10-12 10:21:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 10:21:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-12 10:21:01,432 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2020-10-12 10:21:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:01,432 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-12 10:21:01,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 10:21:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-12 10:21:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 10:21:01,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:01,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:01,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:21:01,434 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:01,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1443575666, now seen corresponding path program 1 times [2020-10-12 10:21:01,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:01,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933138585] [2020-10-12 10:21:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:01,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:01,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:01,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 10:21:01,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:01,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-12 10:21:01,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:01,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:21:01,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:01,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:21:01,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:01,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:01,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:01,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:01,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:01,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 10:21:01,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:01,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933138585] [2020-10-12 10:21:01,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:21:01,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:21:01,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741497173] [2020-10-12 10:21:01,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:21:01,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:01,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:21:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:21:01,699 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-12 10:21:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:01,802 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-12 10:21:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:21:01,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 10:21:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:01,805 INFO L225 Difference]: With dead ends: 36 [2020-10-12 10:21:01,805 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 10:21:01,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:21:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 10:21:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-12 10:21:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 10:21:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-12 10:21:01,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-10-12 10:21:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:01,814 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-12 10:21:01,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:21:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-12 10:21:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:21:01,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:01,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:01,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:21:01,816 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash 31729808, now seen corresponding path program 1 times [2020-10-12 10:21:01,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:01,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816574473] [2020-10-12 10:21:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:01,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:01,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:02,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:02,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:21:02,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:02,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-12 10:21:02,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:02,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:21:02,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:02,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:21:02,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:21:02,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:02,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:02,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:02,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:02,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:02,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:21:02,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:02,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:02,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816574473] [2020-10-12 10:21:02,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:02,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:21:02,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691097305] [2020-10-12 10:21:02,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:21:02,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:21:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:21:02,269 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-12 10:21:02,548 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-12 10:21:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:02,700 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-12 10:21:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:21:02,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-12 10:21:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:02,702 INFO L225 Difference]: With dead ends: 43 [2020-10-12 10:21:02,703 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:21:02,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:21:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:21:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-12 10:21:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 10:21:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 10:21:02,713 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2020-10-12 10:21:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:02,713 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 10:21:02,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:21:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 10:21:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:21:02,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:02,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:02,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:21:02,715 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:02,715 INFO L82 PathProgramCache]: Analyzing trace with hash 457525806, now seen corresponding path program 2 times [2020-10-12 10:21:02,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:02,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915801541] [2020-10-12 10:21:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:02,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:02,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:03,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:03,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:21:03,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:03,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-12 10:21:03,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:21:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:21:03,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:21:03,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:03,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:03,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:03,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:03,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:03,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:21:03,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:03,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:03,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:21:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:03,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915801541] [2020-10-12 10:21:03,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:03,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:21:03,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634103216] [2020-10-12 10:21:03,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:21:03,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:21:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:21:03,198 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-12 10:21:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:03,521 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-12 10:21:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:21:03,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-12 10:21:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:03,525 INFO L225 Difference]: With dead ends: 39 [2020-10-12 10:21:03,525 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:21:03,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:21:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:21:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2020-10-12 10:21:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 10:21:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-12 10:21:03,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 17 [2020-10-12 10:21:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:03,533 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-12 10:21:03,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:21:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-12 10:21:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 10:21:03,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:03,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:03,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:21:03,535 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1454236359, now seen corresponding path program 1 times [2020-10-12 10:21:03,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:03,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186212129] [2020-10-12 10:21:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:03,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:03,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:03,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 10:21:03,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:21:03,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-12 10:21:03,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:03,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:21:03,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:21:03,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:21:03,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:04,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:04,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:04,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:04,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:04,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:04,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:21:04,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:21:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:21:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:21:04,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 10:21:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:04,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:04,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:04,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:21:04,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:04,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:21:04,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:04,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:21:04,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:04,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:21:04,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:21:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:04,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186212129] [2020-10-12 10:21:04,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:04,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:21:04,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486999294] [2020-10-12 10:21:04,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:21:04,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:21:04,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:21:04,164 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-12 10:21:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:04,971 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-12 10:21:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:21:04,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-12 10:21:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:04,973 INFO L225 Difference]: With dead ends: 48 [2020-10-12 10:21:04,973 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 10:21:04,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:21:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 10:21:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 10:21:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 10:21:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-12 10:21:04,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2020-10-12 10:21:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:04,982 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-12 10:21:04,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:21:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-12 10:21:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:21:04,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:04,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:04,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:21:04,984 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -744847771, now seen corresponding path program 2 times [2020-10-12 10:21:04,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:04,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031284687] [2020-10-12 10:21:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:05,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:05,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:05,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:05,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:05,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:21:05,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:21:05,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-12 10:21:05,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:21:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:21:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:21:05,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:05,879 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 10:21:06,158 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-12 10:21:06,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:06,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:06,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:06,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:06,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:06,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:21:06,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:21:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:21:06,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:06,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 10:21:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:06,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:06,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:21:06,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 10:21:06,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:21:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:21:06,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:06,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031284687] [2020-10-12 10:21:06,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:06,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:21:06,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934615376] [2020-10-12 10:21:06,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:21:06,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:21:06,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:21:06,639 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 16 states. [2020-10-12 10:21:07,529 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-12 10:21:08,024 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-12 10:21:08,621 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-12 10:21:09,003 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-12 10:21:09,289 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 10:21:09,760 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-12 10:21:10,550 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-12 10:21:11,138 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-12 10:21:11,566 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-12 10:21:12,296 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-12 10:21:12,524 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-12 10:21:13,275 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-12 10:21:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:13,337 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-12 10:21:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:21:13,339 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-12 10:21:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:13,340 INFO L225 Difference]: With dead ends: 49 [2020-10-12 10:21:13,340 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 10:21:13,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:21:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 10:21:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 10:21:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:21:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-12 10:21:13,349 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-10-12 10:21:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:13,349 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-12 10:21:13,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:21:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-12 10:21:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:21:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:13,350 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:13,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:21:13,351 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash -940787069, now seen corresponding path program 3 times [2020-10-12 10:21:13,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:13,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429315704] [2020-10-12 10:21:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:13,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:13,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:13,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:14,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:14,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:21:14,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:21:14,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-12 10:21:14,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:21:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:21:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:21:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:21:15,985 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-10-12 10:21:16,525 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-10-12 10:21:17,505 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 76 [2020-10-12 10:21:18,408 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 72 [2020-10-12 10:21:18,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:18,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:18,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:18,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:18,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:21:18,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:18,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:21:18,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:18,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:21:18,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:18,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 10:21:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:18,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:18,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:18,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:21:18,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:18,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:21:18,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:18,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:21:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:21:18,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:18,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429315704] [2020-10-12 10:21:18,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:18,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:21:18,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325772342] [2020-10-12 10:21:18,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:21:18,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:21:18,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:21:18,830 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 18 states. [2020-10-12 10:21:20,850 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-12 10:21:22,284 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-12 10:21:24,137 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2020-10-12 10:21:25,197 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-12 10:21:25,794 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 10:21:26,971 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-12 10:21:29,411 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-10-12 10:21:31,041 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2020-10-12 10:21:32,259 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2020-10-12 10:21:34,168 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2020-10-12 10:21:35,031 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 10:21:37,561 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-12 10:21:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:37,826 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-12 10:21:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:21:37,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-12 10:21:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:37,831 INFO L225 Difference]: With dead ends: 51 [2020-10-12 10:21:37,831 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 10:21:37,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:21:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 10:21:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 10:21:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 10:21:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-12 10:21:37,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-10-12 10:21:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:37,841 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-12 10:21:37,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:21:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-12 10:21:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:21:37,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:37,843 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:37,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:21:37,843 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:37,844 INFO L82 PathProgramCache]: Analyzing trace with hash -259891423, now seen corresponding path program 4 times [2020-10-12 10:21:37,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:37,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751186240] [2020-10-12 10:21:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:37,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:37,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:38,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:38,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:39,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:39,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:21:39,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:21:39,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1401 [2020-10-12 10:21:39,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:39,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:21:39,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:21:39,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:21:39,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:47,987 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-12 10:21:48,671 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-10-12 10:21:51,669 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 179 DAG size of output: 104 [2020-10-12 10:21:55,421 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 179 DAG size of output: 105 [2020-10-12 10:22:02,846 WARN L193 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 483 DAG size of output: 99 [2020-10-12 10:22:10,005 WARN L193 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 485 DAG size of output: 87 [2020-10-12 10:22:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:12,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:12,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:12,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:12,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:12,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:22:12,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:12,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:22:12,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:12,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:22:12,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:22:12,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:22:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:12,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:12,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:12,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:22:12,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:12,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:22:12,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:12,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:22:12,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:12,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:22:12,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:22:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:22:12,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751186240] [2020-10-12 10:22:12,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:12,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:22:12,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155653170] [2020-10-12 10:22:12,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:22:12,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:22:12,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:22:12,991 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 20 states. [2020-10-12 10:22:14,177 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 23 [2020-10-12 10:22:14,514 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 37 [2020-10-12 10:22:15,469 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 39 [2020-10-12 10:22:16,556 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 76 [2020-10-12 10:22:19,793 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 205 DAG size of output: 71 [2020-10-12 10:22:27,215 WARN L193 SmtUtils]: Spent 4.74 s on a formula simplification. DAG size of input: 134 DAG size of output: 125 [2020-10-12 10:22:33,042 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 115 DAG size of output: 109 [2020-10-12 10:22:37,493 WARN L193 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 125 DAG size of output: 119 [2020-10-12 10:22:40,842 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 105 [2020-10-12 10:22:43,760 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 114 [2020-10-12 10:22:47,836 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2020-10-12 10:22:56,348 WARN L193 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 130 DAG size of output: 120 [2020-10-12 10:22:56,574 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-12 10:23:02,634 WARN L193 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 123 DAG size of output: 117 [2020-10-12 10:23:09,482 WARN L193 SmtUtils]: Spent 5.27 s on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-10-12 10:24:21,811 WARN L193 SmtUtils]: Spent 1.09 m on a formula simplification. DAG size of input: 195 DAG size of output: 161 [2020-10-12 10:24:31,170 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 108